Prompt: Generate a highly detailed image of a 1km high mech in a post-apocalyptic world, standing in the ruins of a former metropolitan city within a nuclear wasteland. The camera perspective should look up from below, emphasizing the mech's colossal scale. Pay attention to intricate details on the mech's surface, showcasing battle damage and mechanical complexity. Use a subdued color palette and subtle lighting to enhance the apocalyptic mood. Set the temperature to 0.5 for a balanced mix of creativity and realism.